CN105281556B - Control control circuit, PFC the and AC/DC converters of switch power factor correcting device method - Google Patents

Control control circuit, PFC the and AC/DC converters of switch power factor correcting device method Download PDF

Info

Publication number
CN105281556B
CN105281556B CN201510412366.4A CN201510412366A CN105281556B CN 105281556 B CN105281556 B CN 105281556B CN 201510412366 A CN201510412366 A CN 201510412366A CN 105281556 B CN105281556 B CN 105281556B
Authority
CN
China
Prior art keywords
voltage
turn
current
time
switch
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
CN201510412366.4A
Other languages
Chinese (zh)
Other versions
CN105281556A (en
Inventor
C·卡斯泰利
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
STMicroelectronics SRL
Original Assignee
STMicroelectronics SRL
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by STMicroelectronics SRL filed Critical STMicroelectronics SRL
Publication of CN105281556A publication Critical patent/CN105281556A/en
Application granted granted Critical
Publication of CN105281556B publication Critical patent/CN105281556B/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • H02M1/00—Details of apparatus for conversion
    • H02M1/42—Circuits or arrangements for compensating for or adjusting power factor in converters or inverters
    • H02M1/4208—Arrangements for improving power factor of AC input
    • H02M1/4225—Arrangements for improving power factor of AC input using a non-isolated boost converter
    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05F—SYSTEMS FOR REGULATING ELECTRIC OR MAGNETIC VARIABLES
    • G05F1/00—Automatic systems in which deviations of an electric quantity from one or more predetermined values are detected at the output of the system and fed back to a device within the system to restore the detected quantity to its predetermined value or values, i.e. retroactive systems
    • G05F1/10—Regulating voltage or current
    • G05F1/46—Regulating voltage or current wherein the variable actually regulated by the final control device is dc
    • G05F1/607—Regulating voltage or current wherein the variable actually regulated by the final control device is dc using discharge tubes in parallel with the load as final control devices
    • G05F1/61—Regulating voltage or current wherein the variable actually regulated by the final control device is dc using discharge tubes in parallel with the load as final control devices including two stages of regulation, at least one of which is output level responsive
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • H02M1/00—Details of apparatus for conversion
    • H02M1/42—Circuits or arrangements for compensating for or adjusting power factor in converters or inverters
    • H02M1/4208—Arrangements for improving power factor of AC input
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • H02M1/00—Details of apparatus for conversion
    • H02M1/0048—Circuits or arrangements for reducing losses
    • H02M1/0054—Transistor switching losses
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B70/00—Technologies for an efficient end-user side electric power management and consumption
    • Y02B70/10—Technologies improving the efficiency by using switched-mode power supplies [SMPS], i.e. efficient power electronics conversion e.g. power factor correction or reduction of losses in power supplies or efficient standby modes

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • General Physics & Mathematics (AREA)
  • Radar, Positioning & Navigation (AREA)
  • Automation & Control Theory (AREA)
  • Rectifiers (AREA)
  • Dc-Dc Converters (AREA)

Abstract

Propose control circuit, PFC the and AC/DC converters of control switch power factor correcting device method.Control circuit controls switch power factor correcting device by input charge during control turn-on time based on switch OFF time modulation.Circuit includes charging current generator circuit, its generate charging current be used as using the peak value for corresponding to rectified input voltage square the copy of current sensing signal that is amplified of gain, tank capacitors, it is charged with charging current in interim turn-on time, and interim is discharged with discharge current between when off, discharge current generator, it generates the proportional discharge current of the product of difference between output voltage to comparison voltage and after the adjustment and rectified input voltage, and PWM modulator, sensing loop voltage on capacitor, in response to detecting that charging voltage connects power switch within duration turn-on time in vain, and past tense switch-off power switchs in duration turn-on time.

Description

Control circuit, PFC and the AC/DC for controlling switch power factor correcting device method turn Parallel operation
Technical field
This disclosure relates to power converter circuit, more particularly to implement for controlling switch power factor correcting device (PFC) Correlation technique control circuit, PFC and the AC/DC converters including PFC.
Background technology
Many electronic equipments of such as computer, television set or rechargeable battery use D/C voltage as supply voltage, because This by the available AC voltages of power supply is converted through AC/DC.Feelings especially relatively large in the power consumption of the load of power supply Under condition, using PFC to minimize reactive power and maximize the active power absorbed from power supply.In this feelings Under condition, the AC/DC converters for providing PFC include that power factor corrector (PFC) and final level are coupled to PFC's DC/DC converters.
PFC types shown in Fig. 1 generally include to carry out rectification to supply voltage and generate rectified input voltage The electricity of the bridge rectifier of Vin, the core PFC_PLANT for generating DC output voltage Vout and sensing output voltage Vout, rectification It presses Vin and flows through the electric current of inductance and generate the power switch SW's for ON/OFF converter PFC_PLANT Control the control circuit CONTROL LOOP of signal.Core PFC_PLANT can be controlled with continuous current mode (CCM), and And the electric current absorbed from power supply be substantially it is sinusoidal and with supply voltage same-phase, schematically by the imitative of the PFC by Fig. 1 The electric current (1) by inductor that really obtains, the low-frequency component (2) by the electric current of inductor, the electric current (3) by switch, It is shown by the exemplary timing chart of Fig. 2 of the control signal (5) of the electric current (4) and switch SW of diode.Newest specification The high frequency and good power factor (PF) across entire loading range are defined with international standard.In the target that the field will be obtained Be limited surely can across entire loading range in high load condition in the efficiency of the raising with low total harmonic distortion (THD) together New PFC control methods.
With CCM and averagecurrent mode control PFC may be controlled using constant switching frequency.Such control technology exists This field is known.Average-current mode can be by sensing input voltage and by means of multiplier circuit or no input line Road feel is surveyed to be implemented to generate reference signal.It is used in the UCC28180 of Texas Instrument and the ICE1PCS01 equipment of Infineon The second method, tables of data those skilled in the art will obtain details.In both cases, the feedback control of CCM PFC Circuit processing processed indicates the sensing signal Isense for being circulated through the electric current of inductor L.One master of averagecurrent mode control It is characterized in the presence of two control loops, voltage circuit and current loop.The two in them requires suitable compensation network.
Due to high switching loss, constant frequency averagecurrent mode control also has in the low-down efficiency gently loaded. In addition, averagecurrent mode control device is presented on the non-linear spy for increasing harmonic distortion in discontinuous current mode (DCM) operation Property.
Implement another control technology in the equipment PFS Hiper that power integrates.In such devices, switching frequency is Variable, and the duration of turn-on time and turn-off time are respectively by constant amp- turn-on time second control and constant volt- The control of turn-off time second limits.Technical staff further obtains the tables of data of the above equipment in detail.The defect of these equipment is companion Change with the very wide switching frequency of root input voltage range and the input voltage angle of flow.In particular, corner connection is connected online At nearly 90 degree, the switching frequency with high input voltage (230AC) can be very low.Such frequency curve has risk very much, Because it can introduce the oscillation of EMI input filters.
By Qian Li, Fred C.Lee, Ming Xu and Chuanyun Wang in energy conversion meeting in 2009 and exhibition Can ECCE in Septembers, 2009,2009 20-24 days in the page number " Light load efficiency delivered of page 3755-3760 Improvement for PFC " are disclosed for being controlled the CCM at light load using suitable Constant on-time control technology The digital display circuit of PFC.Suitable Constant on-time has many attracting features, and automatic such as switching frequency reduces, draws The efficiency at improved light load risen.However, the method suggestion described in existing article is calculated by means of digital forecast method Turn-off time.Unfortunately, algorithm is relative complex and digital display circuit (DSP microprocessors and quick A/D converter) is needed to defeated Enter voltage and the immediate duration of next turn-off time is sampled and calculated by the electric current of inductor.The solution Certainly scheme is not very attractive, because increasing the totle drilling cost of PFC.
Invention content
The PFC that one embodiment of the disclosure provides the switch power power supply for being operated in CCM is set Standby, which overcome disadvantages described above and limitation.The method proposed allow the advantage for controlling the turn-on time being suitble to it is simple, Inexpensive full analog circuit embodiment is combined.
Control loop is implemented by being modulated appropriately switch OFF time, and turn-on time interval passes through independent connection Time generator circuit determines.In the method, be be controlled to obtain desired input current shape (power because Number) switch ON time input charge.
By the disclosure, the extraordinary input current shape in all modes of operation is realized using single-circuit configurations. The missing of external compensation component for current loop stable state leads to the simpler of converter requirement more controlled than traditional two circuits Design.
The control principle of proposition can also manage both CCM and DCM states without any discontinuous, while ensure in institute There is the high efficiency level of load condition.
One embodiment of the application is the method for controlling switch power control switch power factor correcting device, the switch Power factor corrector receives rectified input voltage and the output voltage of offer after the adjustment.The method includes：Setting The duration at the turn-off time interval of the power switch of switch power factor correcting device.The setting includes：
Copy of the charging current as current sensing signal is generated, is based on flowing through the switch power factor correcting The electric current of device, with the peak value corresponding to rectified input voltage square gain be amplified；
It is charged to tank capacitors with the charging current of interim turn-on time, and in the power switch Interim turn-off time discharges to tank capacitors with discharge current, the value of discharge current and comparison voltage and after the adjustment Output voltage and the rectified input voltage between difference product it is proportional；
Charging voltage in response to detecting the tank capacitors is invalid, and the work(is connected with duration turn-on time Rate switchs；And
Switch-off power switch is pass by duration turn-on time.
Control circuit can realize with analog component and be determined by implementing this method the turn-off time of power switch. PFC includes the control circuit of the disclosure, and also discloses that AC/DC dc-dc converters.
The claim submitted is the integral part of the application and incorporated herein by reference.
Description of the drawings
Fig. 1 depicts PFC.
Fig. 2 be the PFC of Fig. 1 CCM states in obtain by PFC wicking receive electric current I sequence diagram.
Fig. 3 depicts the PFC of the closed control circuit CONTROL LOOP with the disclosure.
Fig. 4 shows the embodiment of the PFC with closed control circuit according to the disclosure, the wherein exemplary plot of sub-circuit Duration for the turn-off time interval for determining next switch periods；
Sense resistor Rsense in accordance with an embodiment of the present disclosure, is connected to the power switch of PFC by Fig. 5 a and 5b diagram The alternative of SW；
Fig. 6 depicts the son electricity of the duration at the turn-off time interval for determining next switch periods with Fig. 4 The sequence diagram of the power supply signal of the PFC of the Fig. 3 on road；
Fig. 7 shows another embodiment of the PFC with closed control circuit according to the disclosure, wherein considering sensing Output voltage and the value of input voltage of sensing be used to determine duration at turn-on time interval.
Fig. 8 depicts the example of the adjusting of duration turn-on time related with the circuit angle of the half period of input voltage Property characteristic.
Fig. 9 show according to the disclosure to include functional block for managing DCM functions have a close loop control circuit Another embodiment of PFC.
Figure 10 depict the PFC of Fig. 9 of the sub-circuit with Fig. 4 the power supply signal of DCM operation state sequence diagram.It is negative It carries status information and may be used to determine whether duration turn-on time.
Figure 11 shows the charging and discharging electricity of the duration with the turn-off time for determining next switch periods Another embodiment of the PFC with closed control circuit according to the disclosure of the different embodiments of stream.
Figure 12 shows the different embodiments of the PFC with closed control circuit according to the disclosure, wherein with after the adjustment Output voltage and rectified input voltage between the proportional electric current of difference directly from the auxiliary winding of boost inductor It obtains.
Specific implementation mode
It is depicted in figure 3 including rectifier, filter circuit 10 and PFC according to the exemplary embodiment of the disclosure The AC/DC dc-dc converters of 12A.Ac input voltage from power supply 14 passes through rectifier and 10 rectification of filter circuit and filter Wave comprising rectifier bridge and the input filter for obtaining rectified input voltage vin.PFC 12A include inductor 16, Power switch 18, output diode 20, output capacitor 22, sense resistor 24 and closed control circuit 26.Control loop 26 Output voltage Vout, input voltage vin and current sensing signal Isense are received, and provides and is used for ON/OFF switch 18 Signal.Current sensing signal Isense indicates to flow through the electric current of switch SW in interim turn-on time, and utilizes Sense resistor Rsense is generated.
Control loop 26 include be configured to determine that between reference voltage V ref and output voltage Vout difference (or indicate The feedback voltage of output voltage Vout) subtracter 28, and from subtracter 28 receive difference and generate it is proportional to difference Error voltage COMP error amplifier 30.Control loop 26 also includes when being configured as that the shutdown of next switch periods is arranged Between be spaced the turn-off time fallout predictor 32 of duration, pulse width regulator (PWM) 34 and be configured as based on coming from PWM 34 control signal controls the gate drivers 36 of power switch 18 turned on and off.OFF time fallout predictor 32, which receives, to be missed Potential difference COMP, input rectifying voltage Vin and output current Vout, and the analog voltage Vloop to PWM in input is provided 34 zero detection comparators 38 of PWM.PWM 34 further includes set-reset flip-floop 40 and ON times generator 42.As analog voltage Vloop When invalid, the triggering of PWM comparators 38 is arranged set-reset flip-floop 40 and so that expression is next to open turn-on time generator to generate Close the pulse of the pwm signal of the duration of the turn-on time in period.Therefore, pwm signal makes the gate drivers of switch 18 36 ON/OFF.
The equation of modulation technique management voltage lifting PFC based on suggestion passes through boost inductor volt-second equilibrium relation is peaceful Equal Controlled in Current Mode and Based equation combines to obtain.In order to understand continuing for the turn-off time interval for determining next switch periods The operating principle of the OFF time fallout predictor 32 of time, lets us consider that following equation：
Wherein θ is line conduction angle.
The equation is obtained by the way that boost inductor volt-second equilibrium relation and averagecurrent mode control equation to be combined .Its between turn-on time and turn-off time provided in CCM operation power factor correctings is provided relationship (input current with Input voltage is proportional).
Therefore, since scheduled turn-on time, switch OFF time can predict to Cycle by Cycle.The possibility of this algorithm is real It is charge/discharge mechanism to apply example comprising to the capacitor that the switching current of the sensing during turn-on time is integrated, and The difference between the output voltage of error amplifier voltage and adjusting and the input voltage of rectification activated during between when off The current generator that is collected of the proportional electric current of product.
The charge/discharge turn-off time fallout predictor of the turn-off time fallout predictor 32 for implementing Fig. 3 is illustrated in Fig. 4 The integrated current embodiment of 32A.OFF time fallout predictor 32A includes gain block 44, variable gain trsanscondutance amplifier 46 and peak It is worth detector (VPP) 48.According to traditional technology, current sensing signal Isense is amplified by gain block 44, then by can Variable-gain trsanscondutance amplifier 46 is further amplified, and GM is based on the rectified input voltage vin by peak detector 48 The detection of crest voltage is arranged by peak detector 48.Peak detector information is for executing feed forward action.Therefore, across Lead amplifier 46 and act as charging current generator, be configurable to generate charging current as with rectified input peak value Voltage VPPThe proportional gain G M amplification of square value current sensing signal Isense copy.
OFF time fallout predictor 32A also includes tank capacitors CLOOP, controlled current flow generator 50, amplifier 52 and subtract Musical instruments used in a Buddhist or Taoist mass 54.Tank capacitors CLOOPBy charging in charging current of interim turn-on time from trsanscondutance amplifier 46, And its charging voltage is analog voltage Vloop.Subtracter 54 receives output voltage Vout and rectified input voltage vin, And provide the difference signal for indicating the difference between output voltage Vout and rectified input voltage vin.Multiplier 52 receives Difference signal from subtracter 54 and the COMP signals from error amplifier 30, and provide and indicate difference signal and COMP Product product signal.Interim between when off, tank capacitors CLOOPIt is discharged by controlled current flow generator 50, It draws the discharge current determined based on the product by comparison voltage COMP and difference signal.The detections of PWM zero of PWM 34 are compared Device 38 determines following moment, the voltage V in the momentLOOPIn vain, and setting trigger pulse is generated, as above with respect to Fig. 3 institutes It discusses, which causes gate drivers 36 to connect switch by making set-reset flip-floop 40 with ON times generator 42 18 are arranged the end in period turn-off time.Connecting switch 18 makes current sensing signal Isense increase again, makes back Road capacitor CLOOPIt is recharged by trsanscondutance amplifier 46.
Therefore, tank capacitors CLOOPCharging voltage VLOOPExpression flows through inductor L during entire switch periods Electric current.
In the trigger pulse exported by PWM zeros detection comparator 38 turn-on time generator is triggered by set-reset flip-floop 40 When 42, turn-on time generator 42 generates that (turn-on time interval continues keeping high logic state to continue specified time interval Time) clock signal, and the clock signal enable closure switch 18 gate drivers 36.
Therefore, the duration of turn-off time does not calculate digitally, but is determined as in an analogue form for completely right Tank capacitors CLOOPThe time discharged.
The different embodiments of identical aspect indicate in Figure 11 and Figure 12.Figure 11 shows to include rectifier and filter circuit The AC/DC dc-dc converters of 10 and the PFC 12B according to another embodiment.PFC 12B include the PFC 12A phases with Fig. 4 Same circuit element (these identical elements are indicated with identical reference numeral), in addition to PFC 12B include implementing according to second The turn-off time fallout predictor 32B of example provides the different embodiments for being charged and discharged electric current.According to the embodiment, shutdown Versus time estimator 32B includes linear transconductance multiplier 70, which, which has, is connected to receive electric current sense It surveys the first input of the sense resistor Rsense of signal Isense, be connected to receive the peak value of the input voltage of rectification Second input of the output of peak detector (VPP) 48 is connected to receive the error amplifier 30 of error voltage COMP The third of the output of output inputs and is connected to the output of the control node of controlled current source 72.Linear transconductance multiplier 70 makes It obtains current source 72 and is multiplied by rectified input as according to following equation to provide the charging current during turn-on time The peak value of voltage square and divided by error amplifier voltage current sensing signal Isense copy.
Figure 12 shows to directly acquire the output voltage and input voltage of the auxiliary winding 74 from boost inductor 16 Between the proportional electric current of difference possibility.In particular, Figure 12 shows the PFC 12C according to another embodiment, class Be similar to the PFC 12A of Fig. 3, in addition to PFC 12C include during period turn-off time to the electric current from auxiliary winding 74 into The sampling of row sampling and holding circuit.
Utilize the control technology, it is not necessary to which monitoring passes through the electric current of inductor 16 during entire switch period, that is, use It is magnetically coupled to the sensing inductance of inductor 16, but it senses electric current during being all in turn-on time enough, i.e., in electric current When flowing through power switch 18, the sense resistor R for being coupled to the switch shown in Fig. 5 a and 5b is utilizedSENSE.This is Relative advantage because it allows the power consumption of reduction sense resistor, and further enhances the efficiency of PFC.As an alternative, The electric current for flowing through switch may be sensed using the sensing FET integrated with the power MOSFET for constituting switch 18.
Has the function of the PFC of Fig. 3 of the sub-circuit of Fig. 4 with reference to the sequence diagram diagram described in figure 6.As solved above It releases, tank capacitors CLOOPCharging voltage VLOOPThe waveform of the basic electric current I for repeating to flow through inductor.As voltage VLOOP When reaching zero, zero detection comparators 38 of PWM trigger the pulse for set-reset flip-floop 40 to be arranged.Therefore, start turn-on time generation Device 42 and the connection switch 18 of order gate drivers 36.The duration (Ton) being spaced between when on past tense, connects Logical time generator 42 resets set-reset flip-floop 40, order gate drivers 36 turn off (Toff) switch 18, and to close Disconnected versus time estimator 32 is to tank capacitors CLOOPElectric discharge is carried out until voltage VLOOPIn vain.
The duration at turn-on time interval can be it is constant, as Fig. 3 PFC in.This causes with line conduction angle Variable power switch frequency operation.Alternative embodiment according to what is shown in fig.7, duration turn-on time can be according at this The level of the rectified input voltage VIN and output voltage VO UT sensed during switch periods is adjustable.In such case Under, turn-on time generator 42A is configured as receiving the input voltage VIN and output voltage VO UT of rectification in input.Example Such as, duration turn-on time can be adjusted according to the angle of flow described in such as Fig. 8, to obtain close to constant fixed frequency Operation.
As shown in the embodiment in fig. 9, the replacement closed control circuit 26B of the disclosure can have for managing The device of DCM functional modes.Control circuit 26B includes PWM 34B according to second embodiment.Zero current detection block (ZCD) 60 PWM 34B are added into for implementing " the valley skip mode " that is referred to as in DCM operation state, by what is described in Figure 10 Exemplary timing chart illustrates.When inductor current I is empty, zero current detection block 60 receives sensing signal Isense in input And pulse is provided to DCM and manages circuit.In this case, even if inductor current I is sky, switch 18 will not be connect It is logical, and therefore charging voltage VLOOPReplicate the turn-off time during inductor current I waveform.Only as charging voltage VLOOP When invalid, zero detection comparators 38 of PWM send out pulse and manage circuit 62 to DCM, and set-reset flip-floop 42 is then arranged.According to the reality Apply mode, the turn-off time modulation of DCM states still by means of implemented by turn-off time fallout predictor 32 the charging proposed/put Motor system is managed without discontinuous between CCM and DCM operation.
Due to the automatic reduction that the method characteristic of proposition is the switching frequency at light load, may obtain even low negative At load state and when the high efficiency for implementing discontinuous current mode (DCM) control.
It is obtained in the efficiency of the raising of low-power P (when being controlled in DCM) and in Gao Gong using according to the PFC of the disclosure Similar performance at rate (when being controlled in CCM).
The control circuit constitutionally of the disclosure can reduce the switching frequency of switch, therefore automatic increase in load reduction System effectiveness.
Basically, the control circuit of the disclosure is to implement the analog machine of PREDICTIVE CONTROL, passes through inductor because according to The electric current of sensing and the turn-off time that next switch periods are estimated based on the difference between voltage Vout and input voltage vin.With Single-circuit configurations acquisition is continuously switched on pattern operation.Using fully-integrated analog component closed circuit, therefore it may be implemented To have inexpensive component.
Various embodiments described above can be in conjunction with to provide other embodiment.Above detailed description can be given These and other changes are made to embodiment.In general, in following following claims, the term used is not construed as to weigh Profit requires to be limited to specific embodiment disclosed in description and claims, but should be interpreted as including together with requiring to protect The possible embodiment of the full scope of the equivalents of the claim of shield together.Therefore, claim is not by disclosure institute Limitation.

Claims (21)

1. a kind of for controlling the control circuit of switch power factor correcting device, the switch power factor correcting device include by with It is set to the input terminal for receiving rectified input voltage, the leading-out terminal for being configured to supply output voltage after the adjustment, packet Include inductor and be coupled to the input terminal and be coupled to the power switch of the leading-out terminal switching network and by It is configured to generate the current sense for indicating that interim turn-on time in the power switch passes through the electric current of the inductor The sensing circuit of signal, the control circuit include：
Charging current generator circuit is configurable to generate charging current as the peak utilized corresponding to rectified input voltage Value square the copy of current sensing signal that is amplified of gain,
Tank capacitors are configured as being charged with the charging current in interim turn-on time, and in institute Interim turn-off time for stating power switch is discharged with discharge current,
Discharge current generator circuit is configured as being coupled to the tank capacitors in interim turn-off time, and And generate the discharge current, the discharge current and comparison voltage and the output voltage after the adjustment with it is described rectified The product of difference between input voltage is proportional, the comparison voltage and reference voltage and the output voltage after the adjustment it Between difference it is proportional, and
PWM modulator is configured as sensing the charging voltage of the tank capacitors, in response to detect the charging voltage without Effect connects the power switch within entire duration turn-on time, and has pass by duration turn-on time When turn off the power switch.
2. control circuit according to claim 1, wherein the charging current generator circuit includes：
Peak detector is configured as receiving the rectified input voltage, and
Trsanscondutance amplifier has the adjustable gain for being configured as controlling by the peak detector, the trsanscondutance amplifier It is configured as generating the charging current based on the current sensing signal.
3. control circuit according to claim 1, wherein the discharge current generator includes：
Error amplifier is configurable to generate the comparison voltage,
Subtracter, the institute between the output voltage and the rectified input voltage that are configurable to generate described in indicating after the adjustment The voltage of difference is stated, and
Multiplier is coupled to the error amplifier and the subtracter, and is configurable to generate the discharge current.
4. control circuit according to claim 1, wherein the PWM modulator includes：
Comparator is configured as receiving the charging voltage in input, and in response to detecting that the charging voltage is invalid Trigger pulse is generated to signal the end at a turn-off time interval in the turn-off time interval,
Monostable generator is configured to respond to start by the trigger pulse, generates timing signal, the timing signal It is maintained at high logic state in entire turn-on time interval duration, and
Driver is configured to respond to the timing signal and is closed the power switch in high logic state.
5. control circuit according to claim 4, wherein the monostable generator is configured as described in input reception Output voltage after the adjustment and the rectified input voltage, and according to the rectified input voltage and it is described through adjust The existing line conduction angle of the output voltage of section adjusts the turn-on time interval duration.
6. control circuit according to claim 4, wherein the PWM modulator further includes：
Zero current detector is configured as receiving the current sensing signal in input, and in response to detecting the electric current Sensing signal is that null value generates zero detection pulse at each switch periods of the switch；
Discontinuous current mode manages circuit, is configured as receiving each zero detection pulse and the trigger pulse, quilt in input It is configured to start the monostable generator when receiving the trigger pulse when the current sensing signal is null value.
7. a kind of switch power factor correcting device, including：
Input terminal is configured as receiving rectified input voltage；
Leading-out terminal is configured such that rectified output voltage is available；
Switching network, including inductor and be coupled to the input terminal and be coupled to the power switch of the leading-out terminal, The power switch is configured as during switch periods, the power switch on-state interim turn-on time Inductor is coupling in magnetic path, and the power switch will be described in interim turn-off time of off state Inductor is coupling in discharge path；
Sensing circuit is configurable to generate expression and flows through the electric current of the inductor in interim turn-on time Current sensing signal；And
Control circuit, including：
Charging current generator circuit is configurable to generate charging current as the peak utilized corresponding to rectified input voltage Value square the copy of current sensing signal that is amplified of gain,
Tank capacitors are configured as being charged with the charging current in interim turn-on time, and in institute Interim turn-off time for stating power switch is discharged with discharge current,
Discharge current generator circuit is configured as being coupled to the tank capacitors in interim turn-off time, and And the discharge current is generated, the discharge current and comparison voltage and output voltage after the adjustment and the rectified input The product of difference between voltage is proportional, between the comparison voltage and reference voltage and the output voltage after the adjustment Difference is proportional, and
PWM modulator is configured as sensing the charging voltage of the tank capacitors, in response to detect the charging voltage without Effect connects the power switch within entire duration turn-on time, and has pass by duration turn-on time When turn off the power switch.
8. switch power factor correcting device according to claim 7, wherein the charging current generator circuit includes：
Peak detector is configured as receiving the rectified input voltage, and
Trsanscondutance amplifier has the adjustable gain for being configured as controlling by the peak detector, the trsanscondutance amplifier It is configured as generating the charging current based on the current sensing signal.
9. switch power factor correcting device according to claim 7, wherein the discharge current generator includes：
Error amplifier is configurable to generate the comparison voltage,
Subtracter, the difference between the output voltage and the rectified input voltage that are configurable to generate described in indicating after the adjustment The voltage of value, and
Multiplier is coupled to the error amplifier and the subtracter, and is configurable to generate the discharge current.
10. switch power factor correcting device according to claim 7, wherein the PWM modulator includes：
Comparator is configured as receiving the charging voltage in input, and in response to detecting that the charging voltage is invalid Trigger pulse is generated to signal the end at a turn-off time interval in the turn-off time interval,
Monostable generator is configured to respond to start by the trigger pulse, generates timing signal, the timing signal It is maintained at high logic state in entire turn-on time interval duration, and
Driver is configured to respond to the timing signal and is closed the power switch in high logic state.
11. switch power factor correcting device according to claim 10, wherein the monostable generator is configured as Output voltage after the adjustment and the rectified input voltage described in input reception, and according to the rectified input electricity The existing line conduction angle with the output voltage after the adjustment is pressed to adjust the turn-on time interval duration.
12. switch power factor correcting device according to claim 10, wherein the PWM modulator further includes：
Zero current detector is configured as receiving the current sensing signal in input, and in response to detecting the electric current Sensing signal is that null value generates zero detection pulse at each switch periods of the switch；
Discontinuous current mode manages circuit, is configured as receiving each zero detection pulse and the trigger pulse, quilt in input It is configured to start the monostable generator when receiving the trigger pulse when the current sensing signal is null value.
13. a kind of AC/DC dc-dc converters, including：
Input filter and rectification stage have and are configured as receiving supply voltage and generate the connecting pin of rectified input voltage Son；And
Switch power factor correcting device comprising：
Input terminal is configured as receiving rectified input voltage；
Leading-out terminal is configured such that rectified output voltage is available；
Switching network, including inductor and be coupled to the input terminal and be coupled to the power switch of the leading-out terminal, The power switch is configured as during switch periods, the power switch on-state interim turn-on time Inductor is coupling in magnetic path, and the power switch will be described in interim turn-off time of off state Inductor is coupling in discharge path；
Sensing circuit is configurable to generate expression and flows through the electric current of the inductor in interim turn-on time Current sensing signal；And
Control circuit, including：
Charging current generator circuit is configurable to generate charging current as the peak utilized corresponding to rectified input voltage Value square the copy of current sensing signal that is amplified of gain,
Tank capacitors are configured as being charged with the charging current in interim turn-on time, and in institute The electric current for stating interim turn-off time of power switch discharges,
Discharge current generator circuit is configured as being coupled to the tank capacitors in interim turn-off time, and And the discharge current is generated, the discharge current and comparison voltage and output voltage after the adjustment and the rectified input The product of difference between voltage is proportional, between the comparison voltage and reference voltage and the output voltage after the adjustment Difference is proportional, and
PWM modulator is configured as sensing the charging voltage of the tank capacitors, in response to detect the charging voltage without Effect connects the power switch within entire duration turn-on time, and has pass by duration turn-on time When turn off the power switch.
14. AC/DC dc-dc converters according to claim 13, wherein the charging current generator circuit includes：
Peak detector is configured as receiving the input voltage of the rectification, and
Trsanscondutance amplifier has the adjustable gain for being configured as controlling by the peak detector, the trsanscondutance amplifier It is configured as generating the charging current based on the current sensing signal.
15. AC/DC dc-dc converters according to claim 13, wherein the discharge current generator includes：
Error amplifier is configurable to generate the comparison voltage,
Subtracter, the difference between the output voltage and the rectified input voltage that are configurable to generate described in indicating after the adjustment The voltage of value, and
Multiplier is coupled to the error amplifier and the subtracter, and is configurable to generate the discharge current.
16. AC/DC dc-dc converters according to claim 13, wherein the PWM modulator includes：
Comparator is configured as receiving the charging voltage in input, and in response to detecting that the charging voltage is invalid Trigger pulse is generated to signal the end at a turn-off time interval in the turn-off time interval,
Monostable generator is configured to respond to start by the trigger pulse, generates timing signal, the timing signal It is maintained at high logic state in entire turn-on time interval duration, and
Driver is configured to respond to the timing signal and is closed the power switch in high logic state.
17. AC/DC dc-dc converters according to claim 16, wherein the monostable generator is configured as inputting Output voltage after the adjustment and rectified input voltage described in receiving, and according to the rectified input voltage and described The existing line conduction angle of output voltage after the adjustment adjusts the turn-on time interval duration.
18. AC/DC dc-dc converters according to claim 16, wherein the PWM modulator further includes：
Zero current detector is configured as receiving the current sensing signal in input, and in response to detecting the electric current Sensing signal is that null value generates zero detection pulse at each switch periods of the switch；
Discontinuous current mode manages circuit, is configured as receiving each zero detection pulse and the trigger pulse, quilt in input It is configured to start the monostable generator when receiving the trigger pulse when the current sensing signal is null value.
19. a kind of method for controlling switch power factor correcting device, the switch power factor correcting device receives rectified Input voltage and output voltage after the adjustment is provided, the method includes：
Be arranged the power switch of the switch power factor correcting device turn-on time interval and turn-off time interval it is lasting when Between, the setting includes：
Copy of the charging current as current sensing signal is generated, based on flowing through the switch power factor correcting device The electric current of inductor, with the peak value corresponding to the rectified input voltage square gain be amplified；
It is charged to tank capacitors with the charging current in interim turn-on time, and is used in the shutdown It is discharged the tank capacitors with discharge current during time interval, the value and institute of the discharge current and comparison voltage The product for stating the difference between output voltage after the adjustment and the rectified input voltage is proportional, the comparison voltage with Difference between reference voltage and the output voltage after the adjustment is proportional；
Charging voltage in response to detecting the tank capacitors is invalid, within entire duration turn-on time described in connection Power switch；And
Pass by duration turn-on time and when detecting that the charging voltage is invalid described in shutdown Power switch.
20. the method according to claim 11, including：
Sense the value of the sensing of the rectified input voltage during previous switch periods；And
It is connected described in the value of the sensing based on the rectified input voltage and the output voltage setting after the adjustment Time.
21. according to the method for claim 19, being included in discontinuous current mode and controlling the switch power factor school Positive device, the control include：
Zero detection pulse is generated at each switch periods when the current sensing signal is null value；
Become zero in response to the charging voltage of tank capacitors and connects the work(when generating the zero detection pulse Rate switchs.
CN201510412366.4A 2014-07-15 2015-07-14 Control control circuit, PFC the and AC/DC converters of switch power factor correcting device method Active CN105281556B (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ITMI20141282 2014-07-15
ITMI2014A001282 2014-07-15

Publications (2)

Publication Number Publication Date
CN105281556A CN105281556A (en) 2016-01-27
CN105281556B true CN105281556B (en) 2018-09-18

Family

ID=51628322

Family Applications (2)

Application Number Title Priority Date Filing Date
CN201510412366.4A Active CN105281556B (en) 2014-07-15 2015-07-14 Control control circuit, PFC the and AC/DC converters of switch power factor correcting device method
CN201520508601.3U Withdrawn - After Issue CN204947893U (en) 2014-07-15 2015-07-14 The control circuit of control switch power factor corrector, PFC and AC/DC transducer

Family Applications After (1)

Application Number Title Priority Date Filing Date
CN201520508601.3U Withdrawn - After Issue CN204947893U (en) 2014-07-15 2015-07-14 The control circuit of control switch power factor corrector, PFC and AC/DC transducer

Country Status (2)

Country Link
US (1) US9502961B2 (en)
CN (2) CN105281556B (en)

Families Citing this family (32)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9502961B2 (en) * 2014-07-15 2016-11-22 Stmicroelectonics S.R.L. Control circuit implementing a related method for controlling a switching power factor corrector, a PFC and an AC/DC converter
JP6528561B2 (en) * 2015-06-26 2019-06-12 富士電機株式会社 High efficiency power factor correction circuit and switching power supply
US9793883B2 (en) * 2015-09-28 2017-10-17 Cypress Semiconductor Corporation Valley detection circuit and drive circuit
JP6702112B2 (en) * 2015-09-28 2020-05-27 サンケン電気株式会社 Switching power supply device and LED lighting circuit
CN107196528B (en) * 2016-03-15 2019-05-14 三垦电气株式会社 The control method and control circuit of switching power unit
DE102016204974B4 (en) * 2016-03-24 2018-09-20 Dialog Semiconductor (Uk) Limited A circuit and method for reducing sensitivity of a downstream analog control loop to provide path resistance
ITUA20164780A1 (en) 2016-06-30 2017-12-30 St Microelectronics Srl DEVICE AND METHOD OF CONTROL IN VOLTAGE IN THE ALMOST-RESONATING MODE OF A SWITCHING CONVERTER
US10498257B2 (en) * 2016-06-30 2019-12-03 Astec International Limited Switching power converters controlled with control signals having variable on-times
US10090757B2 (en) * 2016-08-19 2018-10-02 Fairchild Semiconductor Corporation Power factor correction circuit and method
US20180069471A1 (en) * 2016-09-06 2018-03-08 Texas Instruments Incorporated Optimizing the efficiency of a boost pre-converter while maintaining input power factor
US10528112B2 (en) * 2016-09-11 2020-01-07 Microsemi P.O.E. Ltd. MPS generation system and method
JP6946878B2 (en) * 2017-09-13 2021-10-13 富士電機株式会社 Power factor improvement circuit and switching power supply using this
KR102470998B1 (en) * 2017-09-21 2022-11-25 현대자동차주식회사 Charging apparatus for vehicle, and current stabilization method thereof
US10020752B1 (en) * 2017-09-26 2018-07-10 Vlt, Inc. Adaptive control of resonant power converters
US10432085B2 (en) * 2017-10-23 2019-10-01 Microchip Technology Incorporated Digital control of switched boundary mode PFC power converter for constant crossover frequency
CN110086335B (en) * 2018-01-26 2024-03-22 Abb瑞士股份有限公司 Frequency control circuit for use in power factor correction circuit
EP3540448A1 (en) * 2018-03-14 2019-09-18 Fico Triad, S.A. Electronic device with pfc circuit and method for measuring alternating current input to the electronic device
CN108667283A (en) * 2018-06-11 2018-10-16 矽力杰半导体技术(杭州)有限公司 A kind of control method and system for reducing THD
US10832846B2 (en) * 2018-08-14 2020-11-10 Automatic Switch Company Low power solenoid with dropout detection and auto re-energization
CN113841327B (en) * 2018-10-29 2024-01-05 德州仪器公司 Switching mode power supply controller
CN109217666A (en) * 2018-11-21 2019-01-15 深圳市必易微电子有限公司 ON-OFF control circuit and method, switch power supply system
US10804793B2 (en) * 2018-12-18 2020-10-13 Lear Corporation Variable zero voltage switching (ZVS) hybrid controller for power factor corrector (PFC)
CN109494990B (en) * 2019-01-03 2020-11-06 深圳市基准半导体有限公司 Load transient response speed improving method based on variable frequency and transconductance
US11502605B2 (en) * 2020-09-09 2022-11-15 Semiconductor Components Industries, Llc Method and system of a quasi-constant on-time controller
US11211872B1 (en) * 2020-09-28 2021-12-28 Delta Electronics, Inc. Power-factor-correction rectifiers with soft switching
CN112510770B (en) * 2020-10-30 2022-12-27 北京精密机电控制设备研究所 Storage battery charging system
CN113748592A (en) * 2020-11-19 2021-12-03 英诺赛科(苏州)科技有限公司 High frequency and power adjustable electronic heating type device and operation method thereof
US11637493B2 (en) * 2020-11-23 2023-04-25 Robert S. Wrathall Electrical circuits for power factor correction by measurement and removal of overtones and power factor maximization
JP2022096152A (en) * 2020-12-17 2022-06-29 富士電機株式会社 Switching control circuit, and power factor improvement circuit
JP2022111535A (en) * 2021-01-20 2022-08-01 トヨタ自動車株式会社 Voltage conversion device
US11695327B2 (en) * 2021-02-25 2023-07-04 Nxp B.V. Power converter control using current reconstruction of power factor correction inductor current
US11742750B2 (en) * 2021-10-11 2023-08-29 Halo Microelectronics International Boost converter apparatus and control method

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2978811B2 (en) * 1996-02-19 1999-11-15 日本電気株式会社 High power factor converter
CN204947893U (en) * 2014-07-15 2016-01-06 意法半导体股份有限公司 The control circuit of control switch power factor corrector, PFC and AC/DC transducer

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5003454A (en) * 1990-01-09 1991-03-26 North American Philips Corporation Power supply with improved power factor correction
JPH07264867A (en) * 1994-03-18 1995-10-13 Toko Inc Ac-dc converter
CN101282079B (en) * 2007-04-05 2011-06-01 昂宝电子（上海）有限公司 System and method for power controller
JP5326804B2 (en) 2008-09-29 2013-10-30 富士電機株式会社 Power factor improving power supply device, control circuit used for power supply device, and control method
US8004262B2 (en) 2008-11-07 2011-08-23 Power Integrations, Inc. Method and apparatus to control a power factor correction circuit
JP2011030292A (en) * 2009-07-22 2011-02-10 Sony Corp Power supply unit
JP5316976B2 (en) * 2010-02-25 2013-10-16 富士電機株式会社 Current estimation circuit
CN103401429B (en) * 2013-08-09 2015-08-26 杭州茂力半导体技术有限公司 A kind of Switching Power Supply and control circuit thereof and control method
US9554431B2 (en) * 2014-01-06 2017-01-24 Garrity Power Services Llc LED driver

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2978811B2 (en) * 1996-02-19 1999-11-15 日本電気株式会社 High power factor converter
CN204947893U (en) * 2014-07-15 2016-01-06 意法半导体股份有限公司 The control circuit of control switch power factor corrector, PFC and AC/DC transducer

Also Published As

Publication number Publication date
CN204947893U (en) 2016-01-06
US9502961B2 (en) 2016-11-22
CN105281556A (en) 2016-01-27
US20160020692A1 (en) 2016-01-21

Similar Documents

Publication Publication Date Title
CN105281556B (en) Control control circuit, PFC the and AC/DC converters of switch power factor correcting device method
CN212323991U (en) Control circuit and power factor correction preconditioner
US7719248B1 (en) Discontinuous conduction mode (DCM) using sensed current for a switch-mode converter
KR101418648B1 (en) System and method of feed forward for boost converters with improved power factor and reduced energy storage
US8937469B2 (en) Digital controller based detection methods for adaptive mixed conduction mode power factor correction circuit
JP5182375B2 (en) PFC converter
CN108631578B (en) Control unit for switching converter operating in continuous conduction and peak current control mode
US8102165B2 (en) Means of eliminating electrolytic capacitor as the energy storage component in the single phase AD/DC two-stage converter
US8270190B2 (en) Fixed-off-time power factor correction controller
US10819224B2 (en) Power factor correction circuit, control method and controller
US20050219871A1 (en) Piecewise on-time modulation apparatus and method for a power factor corrector
JPWO2003047080A1 (en) Switching power supply
US20190260280A1 (en) Error amplification apparatus and driving circuit including the same
WO2006022107A1 (en) Power factor improving circuit
JP2009225658A (en) Controller for use in buck converter and method for controlling buck converter
TW201308842A (en) Buck converter and its control circuit and control method
KR20200040673A (en) Switched mode power supply with pfc burst mode control
CN109088536B (en) Active power factor correction circuit and method for improving harmonic waves and driving system
EP3459168A1 (en) A bifred converter and a method of driving an output load
JP2005287249A (en) Switching power supply
US11095206B2 (en) AC-DC converter with boost front end having flat current and active blanking control
US7088079B2 (en) Active power factor correction
JP6116153B2 (en) LED power supply for lighting
Mahdavikhah et al. A hardware-efficient programmable two-band controller for PFC rectifiers with ripple cancellation circuits
Tian et al. Research of the adaptive control on modulation factor for PSR fly‐back PSM converter

Legal Events

Date Code Title Description
C06 Publication
PB01 Publication
C10 Entry into substantive examination
SE01 Entry into force of request for substantive examination
GR01 Patent grant
GR01 Patent grant